Interim vs Acting: Key Differences and When to Use Each

Interim and acting managers both provide temporary leadership, but they serve different purposes. Interim managers bring external expertise for strategic change, while acting managers maintain internal continuity.

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Introduction to Interim vs Acting Managers

In the world of leadership and management, businesses often face situations where they need temporary expertise to navigate transitions, crises, or strategic projects. Two common solutions are interim managers and acting managers. While these roles may seem similar at first glance, they serve distinct purposes and are suited to different scenarios. In this article, we’ll break down the differences between interim vs acting roles, explore their unique benefits, and help you decide which solution is right for your organization.

What is an Interim Manager?

An interim manager is a highly experienced professional brought in to fill a leadership role on a temporary basis. They are typically external hires who specialize in managing change, solving complex problems, or driving specific projects. Interim managers are often used during periods of transformation, such as mergers, restructuring, or sudden leadership gaps.

Key Characteristics of Interim Managers:

  • Short-term focus: Hired for a defined period, usually 3 to 12 months.
  • Expertise-driven: Brings specialized skills and industry knowledge.
  • Objective perspective: As an external hire, they provide unbiased insights and solutions.
  • Results-oriented: Focused on delivering measurable outcomes within a limited timeframe.

What is an Acting Manager?

An acting manager is an internal employee who temporarily steps into a leadership role, often to cover for a manager who is on leave, transitioning out, or unavailable. Acting managers are typically chosen from within the organization and are expected to maintain continuity while the permanent role is filled.

Key Characteristics of Acting Managers:

  • Internal appointment: Usually an existing employee familiar with the organization.
  • Continuity-focused: Maintains operations and ensures stability during transitions.
  • Short-term solution: Typically covers a brief period, such as a few weeks or months.
  • Limited scope: Often lacks the authority or mandate to drive major changes.

Interim vs Acting: Key Differences

AspectInterim ManagerActing Manager
SourceExternal hireInternal employee
DurationMedium-term (3–12 months)Short-term (weeks to a few months)
FocusStrategic change and problem-solvingMaintaining continuity and stability
ExpertiseSpecialized skills and industry experienceFamiliarity with internal processes
CostHigher due to expertise and external hiringLower, as they are already on payroll

Real-Life Examples of
Interim and Acting Solutions

A mid-sized manufacturing company was struggling with declining profits due to outdated processes and inefficiencies in its supply chain. To address these challenges, they hired an interim operations manager with extensive experience in lean manufacturing and process optimization.

The interim manager conducted a thorough assessment of the company’s operations, identifying bottlenecks and areas for improvement. Within six months, they implemented a series of changes, including:

  • Streamlining production workflows to reduce waste.
  • Introducing new inventory management systems.
  • Training staff on best practices for operational efficiency.

As a result, the company saw a 20% increase in profitability and a 15% reduction in operational costs. The interim manager’s expertise and objective perspective were instrumental in turning the company’s performance around.

A well-known retail chain faced a leadership gap when its regional manager went on maternity leave. To ensure continuity, the company appointed an acting manager from within its ranks—a senior store manager with a deep understanding of the company’s operations and culture.

The acting manager successfully:

  • Maintained day-to-day operations across multiple stores.
  • Kept employee morale high by providing clear communication and support.
  • Ensured sales targets were met during a critical holiday season.

When the regional manager returned, the acting manager was praised for their seamless leadership and even received a promotion for their efforts. This example highlights how acting managers can provide stability and foster internal talent development.

A fast-growing tech startup needed to scale its operations rapidly but lacked the leadership to manage the transition. Initially, the company appointed an acting CEO from its founding team. However, the acting CEO struggled with strategic decision-making and securing investor confidence.

Recognizing the need for specialized expertise, the startup brought in an interim CEO with a proven track record of scaling tech companies. The interim CEO:

  • Developed and executed a clear growth strategy.
  • Secured $5 million in funding from investors.
  • Hired key executives to build a strong leadership team.

Within a year, the startup achieved a 50% increase in revenue and successfully transitioned to a permanent CEO. This case demonstrates how interim managers can provide the strategic vision and expertise needed during critical growth phases.

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Benefits of Hiring an Interim Manager

Interim managers bring immediate expertise, objective insights, and a results-driven approach to your business. They are ideal for driving strategic change, solving complex problems, and delivering measurable outcomes—all without the long-term commitment of a full-time hire.

 

Interim managers bring specialized skills and industry knowledge to tackle specific challenges.

As external hires, they provide unbiased insights and solutions.

Focused on delivering outcomes within a short timeframe.

Avoids the long-term costs of hiring a full-time executive.

two managers looking at report

Why Businesses Trust Interim Solutions​

GQ Interim Solutions is recognized for delivering top-tier interim managers who provide immediate impact and measurable results. With decades of experience across various industries, these experts help businesses navigate challenges with confidence. Whether an organization requires a strategic leader for transformation or a steady hand to ensure operational continuity, GQ Interim Solutions tailors its services to meet specific business needs.

Common Misconceptions About Interim Managers

Despite their growing popularity, many businesses still have misunderstandings about interim managers. Here are some common myths debunked:

“Interim managers are just temporary placeholders.”

Unlike acting managers who maintain operations, interim managers are change agents, brought in to solve problems, drive transformation, and deliver tangible business impact.

“They take too long to get up to speed.”

Interim managers are highly adaptable and experienced professionals who integrate quickly, assess the situation rapidly, and take immediate action to address key business challenges.

“Interim management is too expensive.”

While interim managers may have higher daily rates, they offer cost-effective solutions by delivering results faster, eliminating recruitment expenses, and avoiding long-term salary commitments.

Interim vs acting manager

When to Choose an Interim Manager

Interim managers are ideal for situations that require:

  • Strategic leadership: Navigating mergers, acquisitions, or restructuring.
  • Crisis management: Addressing urgent issues like financial troubles or operational inefficiencies.
  • Specialized expertise: Implementing new technologies, processes, or systems.
  • Objective decision-making: Providing an unbiased perspective to resolve conflicts or drive change.

When to Choose an Acting Manager

Acting managers are a better fit for scenarios such as:

  • Temporary absences: Covering for a manager on leave or sabbatical.
  • Internal transitions: Bridging the gap during recruitment for a permanent role.
  • Maintaining stability: Ensuring business continuity without major disruptions.
  • Cost-effective solutions: When budget constraints limit external hiring.

Interim statistics

Solving crucial problems of your business
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Solving crucial problems of your business
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"Interim managers bring not just expertise, but a fresh perspective that can transform challenges into opportunities for growth."

By stepping in during critical moments, interim managers help businesses navigate complex challenges and unlock new potential, making them a strategic asset for any organization.

Filip Gergely

CEO GQ Interim

How to hire Interim Manager

Define

Before hiring an interim manager, clearly outline your needs. Identify the challenges your business faces, the specific skills required, and the expected outcomes. Consider whether you need expertise in turnaround management, crisis leadership, or a particular industry specialization. A well-defined scope ensures you attract the right professional who can deliver measurable results within the given timeframe.

Source

Leverage reputable interim management agencies, professional networks, and executive search firms to find qualified candidates. Look for professionals with a proven track record, relevant industry experience, and the ability to adapt quickly. Checking references, past project results, and leadership style ensures the interim manager aligns with your business objectives and company culture.

Integrate

Once selected, onboard the interim manager efficiently by providing access to key stakeholders, critical business data, and company insights. Define clear performance metrics, establish regular check-ins, and allow autonomy to implement changes. Strong collaboration between leadership and the interim professional ensures they can drive transformation while seamlessly integrating into existing teams.

Conclusion

The choice between an interim manager and an acting manager depends on your organization’s specific needs. If you require strategic expertise, rapid change, or specialized skills, an interim manager is the ideal solution. On the other hand, if your goal is to maintain stability and continuity during a short-term gap, an acting manager may be the better choice.

At GQ Interim Solutions, we help businesses make the right decision by providing expert guidance and tailored interim management services. Contact us today to learn how we can support your organization’s success.

Frequently asked questions

Looking for answers about Interim vs Acting Managers? Our FAQ section covers common questions, helping you quickly understand how we deliver tailored solutions for your business needs.

An acting manager is usually an internal employee temporarily filling in for a leader on leave, focusing on maintaining operations. An interim manager is an external expert hired to manage transitions, drive change, or solve specific business challenges over a defined period.

Interim managers are usually engaged for a fixed period, ranging from a few months to a year, depending on the complexity of the assignment. Their contract is flexible and tailored to the company’s needs.

While interim managers often have higher daily rates, they eliminate long-term costs such as benefits, pensions, and onboarding expenses. Their ability to deliver immediate impact and efficiency makes them a cost-effective solution.

Although interim managers are typically hired for temporary assignments, some companies may offer them permanent positions if they demonstrate exceptional leadership and align well with the company’s long-term vision. However, most interim managers specialize in short-term, high-impact roles and prefer project-based work.

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